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1. 发明申请

US20130147393A1 HIGH ACCURACY, HIGH DYNAMIC RANGE LED/LASER DRIVER 有权
标题翻译：高精度，高动态范围的LED /激光驱动器
公开(公告)号：US20130147393A1
公开(公告)日：2013-06-13
申请号：US13492841
申请日：2012-06-09
申请人： Cristiano Bazzani , Fabio Gozzini , Tao Chen
发明人： Cristiano Bazzani , Fabio Gozzini , Tao Chen
IPC分类号： H05B37/02
CPC分类号： H05B37/02 , H05B33/0851
摘要： A current driver circuit, for driving a light source, that provides high accuracy and reduced power consumption is disclosed. The driver includes a digital to analog converter configured to receive a digital value representing a light intensity and convert the digital value to an analog current signal. A current minor is configured to receive the analog current signal and create a current minor output which is larger than the analog current signal based on a ratio of the current mirror. This results in a modified analog current signal. A light source receives the modified analog current signal, and responsive thereto generate a light signal such that the light signal has an intensity controlled by the digital value. One or more amplifiers are also part of the current driver and configured to increase response time and accuracy.
摘要翻译：公开了一种用于驱动光源的电流驱动电路，其提供高精度和降低的功耗。驱动器包括数模转换器，其被配置为接收表示光强度的数字值，并将数字值转换为模拟电流信号。当前小电流被配置为接收模拟电流信号并基于电流镜的比率产生大于模拟电流信号的电流次要输出。这导致修改的模拟电流信号。光源接收修改的模拟电流信号，并且响应于此产生光信号，使得光信号具有由数字值控制的强度。一个或多个放大器也是当前驱动器的一部分，并且被配置为增加响应时间和精度。

2. 发明授权

US09107245B2 High accuracy, high dynamic range LED/laser driver 有权
标题翻译：高精度，高动态范围的LED /激光驱动器
公开(公告)号：US09107245B2
公开(公告)日：2015-08-11
申请号：US13492841
申请日：2012-06-09
申请人： Cristiano Bazzani , Fabio Gozzini , Tao Chen
发明人： Cristiano Bazzani , Fabio Gozzini , Tao Chen
IPC分类号： H05B37/02 , H05B33/08
CPC分类号： H05B37/02 , H05B33/0851
摘要： A current driver circuit, for driving a light source, that provides high accuracy and reduced power consumption is disclosed. The driver includes a digital to analog converter configured to receive a digital value representing a light intensity and convert the digital value to an analog current signal. A current mirror is configured to receive the analog current signal and create a current mirror output which is larger than the analog current signal based on a ratio of the current mirror. This results in a modified analog current signal. A light source receives the modified analog current signal, and responsive thereto generate a light signal such that the light signal has an intensity controlled by the digital value. One or more amplifiers are also part of the current driver and configured to increase response time and accuracy.
摘要翻译：公开了一种用于驱动光源的电流驱动电路，其提供高精度和降低的功耗。驱动器包括数模转换器，其被配置为接收表示光强度的数字值，并将数字值转换为模拟电流信号。电流镜被配置为接收模拟电流信号并且基于电流镜的比率创建大于模拟电流信号的电流镜输出。这导致修改的模拟电流信号。光源接收修改的模拟电流信号，并且响应于此产生光信号，使得光信号具有由数字值控制的强度。一个或多个放大器也是当前驱动器的一部分，并且被配置为增加响应时间和精度。

3. 发明授权

US08643296B2 Color mixing and desaturation with reduced number of converters 有权
标题翻译：彩色混合和减饱和转换器数量减少
公开(公告)号：US08643296B2
公开(公告)日：2014-02-04
申请号：US13302991
申请日：2011-11-22
申请人： Cristiano Bazzani , Fabio Gozzini , Steven Van Nguyen
发明人： Cristiano Bazzani , Fabio Gozzini , Steven Van Nguyen
IPC分类号： H05B37/02
CPC分类号： H05B37/02 , H05B33/086
摘要： A system is disclosed to automatically establish proper biasing for light sources in a color mixed projection system having multiple light sources which are active at the same time. Responsive to a feedback signal, a single DC-DC converter generates the bias voltage for the light sources. Comparators compare a headroom signal for each light source to a reference value to generate comparator output signals. The comparator output signals are processed by a channel selector and a digital filter/DAC module. The channel selector controls a switch to selectively provide and combine a headroom signal with an output of the digital filter/DAC module to create the feedback signal. By monitoring each headroom value, the bias voltage is adjusted, based on the feedback signal, until every headroom signal reaches the reference value thereby achieving sufficient biasing for every active light source in the color mixed projection system.
摘要翻译：公开了一种在具有同时有效的多个光源的彩色混合投影系统中自动建立光源的适当偏置的系统。响应于反馈信号，单个DC-DC转换器产生用于光源的偏置电压。比较器将每个光源的余量信号与参考值进行比较，以生成比较器输出信号。比较器输出信号由通道选择器和数字滤波器/ DAC模块进行处理。通道选择器控制开关以选择性地提供和组合上部空间信号与数字滤波器/ DAC模块的输出以产生反馈信号。通过监视每个净空值，基于反馈信号调整偏置电压，直到每个净空信号达到参考值，从而为彩色混合投影系统中的每个有源光源实现足够的偏置。

4. 发明申请

US20120306399A1 PROJECTOR SYSTEM WITH SINGLE INPUT, MULTIPLE OUTPUT DC-DC CONVERTER 审中-公开
标题翻译：具有单输入，多路输出DC-DC转换器的投影机系统
公开(公告)号：US20120306399A1
公开(公告)日：2012-12-06
申请号：US13486981
申请日：2012-06-01
申请人： Cristiano Bazzani , Fabio Gozzini
发明人： Cristiano Bazzani , Fabio Gozzini
IPC分类号： H05B37/02
CPC分类号： H05B33/086 , H05B33/0815 , H05B33/0827 , Y02B20/347
摘要： A projector system with a single DC-DC converter having a single inductor is disclosed. A single DC-DC converter receives an input voltage and connects to two or more light sources such that each light source receives the same DC-DC converter output signal. Connected to the opposite terminal of the light source is a current source driver which receives a control signal control the voltage levels that determine which light source is the active or full power light source in the time multiplexed image generation arrangement. The use of a DC-DC converter having a single inductor reduces cost and size of the system while still enabling color mixing such that two or more light sources share the same single output of the DC-DC converter.
摘要翻译：公开了具有单个电感器的单个DC-DC转换器的投影仪系统。单个DC-DC转换器接收输入电压并连接到两个或更多个光源，使得每个光源接收相同的DC-DC转换器输出信号。连接到光源的相对端子的电流源驱动器是接收控制信号的电流源驱动器，控制信号控制在时间复用图像产生装置中确定哪个光源是有源或全功率光源的电压电平。使用具有单个电感器的DC-DC转换器降低了系统的成本和尺寸，同时仍然能够进行混色，使得两个或更多个光源共享DC-DC转换器的相同的单个输出。

5. 发明申请

US20120133300A1 COLOR MIXING AND DESATURATION WITH REDUCED NUMBER OF CONVERTERS 有权
标题翻译：颜色混合和减少转换器数量减少
公开(公告)号：US20120133300A1
公开(公告)日：2012-05-31
申请号：US13302991
申请日：2011-11-22
申请人： Cristiano Bazzani , Fabio Gozzini , Steve Van Nguyen
发明人： Cristiano Bazzani , Fabio Gozzini , Steve Van Nguyen
IPC分类号： H05B37/02
CPC分类号： H05B37/02 , H05B33/086
摘要： A system is disclosed to automatically establish proper biasing for light sources in a color mixed projection system having multiple light sources which are active at the same time. Responsive to a feedback signal, a single DC-DC converter generates the bias voltage for the light sources. Comparators compare a headroom signal for each light source to a reference value to generate comparator output signals. The comparator output signals are processed by a channel selector and a digital filter/DAC module. The channel selector controls a switch to selectively provide and combine a headroom signal with an output of the digital filter/DAC module to create the feedback signal. By monitoring each headroom value, the bias voltage is adjusted, based on the feedback signal, until every headroom signal reaches the reference value thereby achieving sufficient biasing for every active light source in the color mixed projection system.
摘要翻译：公开了一种在具有同时有效的多个光源的彩色混合投影系统中自动建立光源的适当偏置的系统。响应于反馈信号，单个DC-DC转换器产生用于光源的偏置电压。比较器将每个光源的余量信号与参考值进行比较，以生成比较器输出信号。比较器输出信号由通道选择器和数字滤波器/ DAC模块进行处理。通道选择器控制开关以选择性地提供和组合上部空间信号与数字滤波器/ DAC模块的输出以产生反馈信号。通过监视每个净空值，基于反馈信号调整偏置电压，直到每个净空信号达到参考值，从而为彩色混合投影系统中的每个有源光源实现足够的偏置。

6. 发明授权

US08243211B2 Reducing power dissipation in portable LCoS/LCD/DLP projection systems 有权
标题翻译：降低便携式LCoS / LCD / DLP投影系统的功耗
公开(公告)号：US08243211B2
公开(公告)日：2012-08-14
申请号：US12384035
申请日：2009-03-30
申请人： Cristiano Bazzani , Daniel Draper
发明人： Cristiano Bazzani , Daniel Draper
IPC分类号： H04N5/64
CPC分类号： H04N9/3179 , G09G3/2011 , G09G3/2018 , G09G3/3426 , G09G3/3611 , G09G2320/0646 , G09G2330/021 , H04N9/3155 , H04N9/3161
摘要： A projection system with one or more light sources reduced power consumption and optional scanning capability is disclosed. A controller processes image data to generate light source control signals and pixel screen control signals which are coordinated to generate an image. Reductions in power consumption occur by matching the light output from the light source to the brightest pixel(s) in the pixel screen for a particular frame. By setting the light output level to an intensity or duration matched to only the maximum level corresponding to a image frame, power consumption is reduced as compared to an embodiment which sets the light source output to its maximum level or maximum duration. The pixel screen, which may be an LCD screen, sets pixel areas corresponding to the brightest pixels as transparent and other, less bring pixels on the pixel screen are set to appropriate levels of reduced transparency.
摘要翻译：具有一个或多个光源的投影系统降低了功耗并且公开了可选的扫描能力。控制器处理图像数据以产生协调以产生图像的光源控制信号和像素屏幕控制信号。通过将来自光源的光输出与特定帧的像素屏幕中的最亮像素匹配来降低功耗。通过将光输出电平设置为仅与对应于图像帧的最大电平相匹配的强度或持续时间，与将光源输出设置为其最大电平或最大持续时间的实施例相比，功耗降低。可以是LCD屏幕的像素屏幕将对应于最亮像素的像素区域设置为透明等，将像素屏幕上较少的像素设置为降低的透明度的适当水平。

7. 发明授权

US07853154B2 Bias circuit for burst-mode/TDM systems with power save feature 有权
标题翻译：具有省电功能的突发模式/ TDM系统的偏置电路
公开(公告)号：US07853154B2
公开(公告)日：2010-12-14
申请号：US11653110
申请日：2007-01-12
申请人： Quazi Ikram , Cristiano Bazzani , Daniel Draper , Maurice M. Reintjes
发明人： Quazi Ikram , Cristiano Bazzani , Daniel Draper , Maurice M. Reintjes
IPC分类号： H04B10/04 , H01S3/00
CPC分类号： H04B10/564 , H01S5/0428
摘要： An optic signal transmit system and biasing method and apparatus and system is disclosed to reduce power consumption during non-transmit periods. An optic signal generator receives a bias signal and an outgoing signal. A burst/transmit enable signal enables the transmit system into transmit mode, such as during a transmit window in a time multiplexed environment such as PON networks. A bias circuit biases the driver and/or optic signal generator. To realize power savings, the bias circuit includes one or more stages which are selectively enabled to adequately bias the driver and optic signal generator during transmit windows but disabled during periods when the system is not transmitting. The bias circuit may comprise a current mirror with a reference device, a fixed device, and switched device, which is selectively included in the circuit by a bias switch. The bias switch is responsive to a burst/transmit enable signal or a signal related thereto.
摘要翻译：公开了一种光信号传输系统和偏置方法及装置和系统，以减少非发射周期内的功耗。光信号发生器接收偏置信号和输出信号。突发/发送使能信号使发送系统能够进入发送模式，例如在诸如PON网络的时间复用环境中的发送窗口期间。偏置电路偏置驱动器和/或光信号发生器。为了实现功率节省，偏置电路包括一个或多个级，其被选择性地使能够在发射窗口期间适当地偏置驱动器和光信号发生器，但在系统不发射的时段期间被禁用。偏置电路可以包括具有参考装置的电流镜，固定装置和开关装置，其通过偏置开关选择性地包括在电路中。偏置开关响应于突发/发送使能信号或与其相关的信号。

8. 发明申请

US20090175302A1 Method and apparatus for reducing optical signal speckle 有权
标题翻译：降低光信号散斑的方法和装置
公开(公告)号：US20090175302A1
公开(公告)日：2009-07-09
申请号：US12218623
申请日：2008-07-15
申请人： Cristiano Bazzani , Daniel Draper , Kevin B. McDonald
发明人： Cristiano Bazzani , Daniel Draper , Kevin B. McDonald
IPC分类号： H01S3/10
CPC分类号： H01S5/06209 , G02B27/48 , H01S5/042 , H01S5/06216 , H01S5/06246 , H01S5/0652 , H04N9/3129 , H04N9/3161
摘要： An optical signal generator is configured with an associated control system and driver configured to reduce speckle. Speckle reduction occurs by pulsing the drive signal between a first current level and a second current level. These pulses force the optical signal generator to introduce oscillations into the optical signal. The coherence of the emitted light is reduced during the period of oscillations in the optical signal, which reduces speckle. In one embodiment, the pulsing of the drive signal brings the drive signal down to a level near or below threshold, which in turn intermittently turns off the optical signal output. Returning the optical signal to a desired optical output intensity introduces the speckle reducing oscillation. The pulse frequency, and duty cycle is controlled by a duty cycle control signal to modulate overall optical power and adjust amount of despeckle.
摘要翻译：光学信号发生器配置有相关联的控制系统和驱动器，其被配置为减少斑点。通过在第一电流电平和第二电流电平之间脉冲驱动信号发生斑点减少。这些脉冲迫使光信号发生器将振荡引入光信号。在光信号的振荡期间，发射光的相干性降低，从而减少斑点。在一个实施例中，驱动信号的脉冲将驱动信号降低到接近或低于阈值的水平，其依次间歇性地关闭光信号输出。将光信号恢复到期望的光输出强度，导致减少散斑振荡。脉冲频率和占空比由占空比控制信号控制，以调整整体光功率并调整去斑量。

9. 发明申请

US20070286609A1 Bias circuit for Burst-Mode/TDM systems with power save feature 有权
标题翻译：用于具有省电功能的突发模式/ TDM系统的偏置电路
公开(公告)号：US20070286609A1
公开(公告)日：2007-12-13
申请号：US11653110
申请日：2007-01-12
申请人： Quazi Ikram , Cristiano Bazzani , Daniel Draper , Maurice Reintjes
发明人： Quazi Ikram , Cristiano Bazzani , Daniel Draper , Maurice Reintjes
IPC分类号： H04B10/04
CPC分类号： H04B10/564 , H01S5/0428
摘要： An optic signal transmit system and biasing method and apparatus and system is disclosed to reduce power consumption during non-transmit periods. An optic signal generator receives a bias signal and an outgoing signal. A burst/transmit enable signal enables the transmit system into transmit mode, such as during a transmit window in a time multiplexed environment such as PON networks. A bias circuit biases the driver and/or optic signal generator. To realize power savings, the bias circuit includes one or more stages which are selectively enabled to adequately bias the driver and optic signal generator during transmit windows but disabled during periods when the system is not transmitting. The bias circuit may comprise a current mirror with a reference device, a fixed device, and switched device, which is selectively included in the circuit by a bias switch. The bias switch is responsive to a burst/transmit enable signal or a signal related thereto.
摘要翻译：公开了一种光信号传输系统和偏置方法及装置和系统，以减少非发射周期内的功耗。光信号发生器接收偏置信号和输出信号。突发/发送使能信号使发送系统能够进入发送模式，例如在诸如PON网络的时间复用环境中的发送窗口期间。偏置电路偏置驱动器和/或光信号发生器。为了实现功率节省，偏置电路包括一个或多个级，其被选择性地使能够在发射窗口期间适当地偏置驱动器和光信号发生器，但在系统不发射的时段期间被禁用。偏置电路可以包括具有参考装置的电流镜，固定装置和开关装置，其通过偏置开关选择性地包括在电路中。偏置开关响应于突发/发送使能信号或与其相关的信号。

10. 发明申请

US20070228257A1 Trans-impedance amplifier with offset current 有权
标题翻译：具有偏移电流的交流阻抗放大器
公开(公告)号：US20070228257A1
公开(公告)日：2007-10-04
申请号：US11392175
申请日：2006-03-29
申请人： Dario Soltesz , Cristiano Bazzani , Wim Cops
发明人： Dario Soltesz , Cristiano Bazzani , Wim Cops
IPC分类号： H03F3/08
CPC分类号： H03F1/08 , H03F1/22 , H03F1/34 , H03F3/087 , H03F3/343 , H03F3/347 , H03F3/45475 , H03F2200/291 , H03F2200/36 , H03F2200/375 , H03F2200/381 , H03F2200/387 , H03F2203/45528
摘要： A trans-impedance amplifier receives an input current and is operable to generate an output voltage responsive to the input current. The amplifier is responsive to an increased range of input currents and has a wide bandwidth. The amplifier includes an input stage having a first and a second transistor and is configured to receive the input current. The amplifier includes an output stage coupled to the input stage and having a third and a fourth transistor. A variable resistor is coupled to the output stage to adjust the amount of current in the output stage. A variable current source is coupled to the output stage and is operable to adjust the amount of current in the output stage. A output driver, which is coupled to the output stage, includes at least another transistor. The output driver is operable to provide the output voltage and is operable to reduce the output impedance of the amplifier.
摘要翻译：跨阻放大器接收输入电流并且可操作以响应于输入电流产生输出电压。放大器响应于增加的输入电流范围并具有宽带宽。放大器包括具有第一和第二晶体管的输入级，并且被配置为接收输入电流。放大器包括耦合到输入级并具有第三和第四晶体管的输出级。可变电阻器耦合到输出级以调节输出级中的电流量。可变电流源耦合到输出级，并且可操作以调节输出级中的电流量。耦合到输出级的输出驱动器至少包括另一个晶体管。输出驱动器可操作以提供输出电压并且可操作以减小放大器的输出阻抗。

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